sh: Add automatic top program selection

When invoking top it will automatically alias to a selection of newer
system monitoring software instead, using the first preferred
application it finds (e.g. bottom over btop++ over gotop over glances
and so on, ending with regular top).

sh/.config/sh/alias.d/top.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env sh
+## Use the preferred system monitoring application
+#  when invoking top.
+
+if exist btm; then
+	alias top="btm"
+elif exist btop; then
+	alias top="btop"
+elif exist gotop; then
+	alias top="gotop"
+elif exist glances; then
+	alias top="glances"
+elif exist bpytop; then
+	alias top="bpytop"
+elif exist bashtop; then
+	alias top="bashtop"
+elif exist htop; then
+	alias top="htop"
+elif exist top; then
+	alias top="top"
+fi